ISrRODUCTION. IX Of Vol. II. of the ' Hand-list,' which contains the Parrots and Picarian Birds, Sir Eay Lankester gives the estimate, in 1900, as follows :— G-enera 454; Species 2861. I believe that some mistake must have been made in the number of genera, as I estimate the number of genera at the present time to be 449, and the species 3099, as shown by the following Table:— Genera. Species. Vol. II.] Order XXVII. Psittacifoembs 83 625 ,, XXVIII. COEACIIFOEMES. Sub-Order 1. Steatornithes 1 2 2. Podargi.' 3 34 3. Leptosomati 1 2 4. Coracise 7 37 5. Haleyones 20 2.36 6. Eucerotes 21 87 7. Upupss 4 32 8. Meropes 5 47 9. Momoti 7 27 10. Todi 1 5 11. Caprimulgi 21 144 12. Cypsell 10 118 13. Trochili 118 590 14. Colli 2 17 Order XXIX. Tbogonbs 10 61 XXX. Coccyges 53 194 „ XXXI. Scansoees 29 258 „ XXXII. PiciFOEMES 53 583 449 3099